了解、研究学生的目的和意义是什么？
在计算机的内置组中，Power Users组有（）管理功能。 ["对计算机有完全控制权限","可以管理administrators组的成员","具有创建用户账户和组账户的权利","可以共享计算机上的文件夹"]
In which situation could a vessel most easily capsize?（） ["Running into head seas","Running in the trough","Running with following seas","Anchored with your bow into the sea"]
银行汇票签发成功的业务状态为（）。 ["已记账","已清算","已冲正","已撤销"]
论述电力系统中有功功率最优分配的概念。
劳动合同期满，用人单位与劳动者约定的服务期尚未到期如何处理？
